Married First and Then Fell in Love with My Mortal Enemy

[Marriage first, love later + childhood sweethearts + happy enemies + sweet pets + double cleanliness, female protagonist's vision] The charming young lady x the affectionate and restrained boy Lin Wanyan and Shen Chenxuan have disliked each other since they were young, and they always get into a fight when they meet. Even Lin Wanyan felt that she and Shen Chenxuan could only be enemies in this life. But one day, Lin's parents told Lin Wanyan that she and Shen Chenxuan were engaged, and they had been dating since childhood. The Shen family even directly announced the news of Lin Wanyan and Shen Chenxuan's upcoming engagement at Shen Chenxuan's birthday party. The next day, Lin Wanyan went directly to the Shen Group and made a three-part agreement with Shen Chenxuan. The two agreed that if the other person likes someone in the future, they would separate. Lin Wanyan waited and waited, but she didn't wait for the two of them to separate, but she waited for a life-long commitment to Shen Chenxuan. [When the male protagonist was ten years old, his brother died tragically. Since then, he has become more stable. It is only when he gets along with the female protagonist that he regains his former youthful appearance. The whole text is mainly about the emotional line, supplemented by the career line, so please proceed with caution.